Capacity: 5-20 tons/hour
Granulation Type: Dry Granulation
Pellet Characteristics: High hardness, uniformity, and roundness
Pellet Formation Rate: 95%
Suitable Materials: Suitable for dry or semi-dry powders (such as traditional Chinese medicine residues and dried, composted mushroom residues). Low hardness requirements are required to avoid mold wear.
Roller: Consists of a die roller and a pressure roller. The roller is typically made of high-hardness alloy steel, such as Cr12MoV, and features a specifically shaped die on its surface.
Drive System: An electric motor drives a belt and pulley, which is then transmitted to the driving shaft via a reducer. The shaft then synchronizes with the driven shaft via split gears.
Feeding Device: A stirring device is installed at the feed inlet to ensure uniform feeding.
Cleaning Device: The main frame of the box is equipped with a self-cleaning device to prevent material from sticking to the rollers.
Screening and Crushing Device: After extrusion, the material is crushed by the crushing device and then screened to separate qualified particles. Unqualified powder is returned for re-granulation.
Working principle of Roller Extrusion Granulator:
After pre-pressing, the material enters two counter-rotating rollers, where it is extruded into sheets (2-5mm thick). It is then crushed and screened to form granules.
The material passes through the high-pressure zone between the two counter-rotating rollers. The roller surfaces are fitted with a specially shaped die. Under mechanical pressure, the material is forced into the die, forming dense granules whose shape is determined by the die. The extruded granules are then scraped from the rollers by a scraper and screened to separate qualified granules from fine material. The fine material can then be returned for further granulation.
Advantages of Roller Extrusion Granulator:
1. High Granulation Rate:
The pelletization rate is over 95%, with fine, regular granules, commonly found in oblate, cylindrical, or tablet shapes.
2. Energy-Saving and Environmentally Friendly:
It requires no high-temperature heating or additional binders, resulting in energy consumption 30% to 50% lower than processes such as disc and drum granulation, and produces no waste gas emissions.
3. High Adaptability:
It can process a variety of organic materials, such as livestock and poultry manure, straw, and sludge, and is suitable for organic materials with a moisture content of 20% to 40%. The high granule density makes it easy to transport and store.
4. Easy Operation:
Pellet size and quality can be flexibly controlled by adjusting parameters such as roller gap and pressure, ensuring simple and convenient operation.
Model | Power (kw) | Granule Diameter(mm) | Roller Sheet Size (mm) | Dimensions (mm) |
ASLDG - 1T | 15 | 3-10 | 150*220 | 1450*800*1450 |
ASLDG - 1.5T | 18.5 | 3-10 | 150*300 | 1450*850*1500 |
ASLDG - 2T | 22 | 3-10 | 185*300 | 1630*850*1650 |
What materials is this equipment suitable for? Are there any moisture content requirements?
It is suitable for a variety of dry powder or low-moisture materials, including organic fertilizers (such as composted manure powder and straw charcoal powder), inorganic fertilizers (such as urea and monoammonium phosphate), feed ingredients, and mining dust. The moisture content of the material must be strictly controlled between 8% and 15%. A moisture content that is too high can easily cause the rollers to stick and pellets to clump, while a moisture content that is too low can make pellets difficult to form. The moisture content must be adjusted through drying or conditioning based on the material's characteristics.
Can the shape and size of the pellets be flexibly adjusted?
Yes, the pellet shape is determined by the die holes on the roller surface. Common shapes include cylindrical, oblate, and square. The shape can be changed by replacing rollers of different sizes. The pellet size can be adjusted by selecting rollers with different hole diameters (usually 1/4"). 0.5-10mm) and adjusting the screens of the crushing and screening equipment to meet the particle size requirements of different industries.
"Is it necessary to add a binder during the production process?
Generally, no binder is required. Double-roll extrusion granulation relies on the material's inherent plasticity or intermolecular attraction to form the pellets, making it particularly suitable for materials with a certain degree of viscosity (such as humus in organic fertilizer). However, for extremely difficult-to-form materials (such as quartz sand), a small amount of natural binders such as starch or bentonite can be added (usually ≤5%) to improve the pelletizing rate.
"What are common operational faults? How can they be prevented and resolved?
Common faults include: ① Roller sticking (due to excessive moisture content or high material viscosity); humidity should be reduced and the rolls should be cleaned regularly; ② Insufficient pellet strength (too little pressure); the inter-roller pressure should be increased; ③ Abnormal equipment vibration (due to bearing wear or material impurities); bearing replacement and enhanced raw material screening are required; ④ Motor overload (excessive load); feed rate adjustment or drive system inspection.
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